Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares

A reconciliation of the components of basic and diluted shares used in the EPS calculation follows:

	3 Months Ended		12 Months Ended
	March 31,		March 31,
	2016	2015	2016	2015
	(in millions)
Weighted-average basic common shares outstanding	175.8	176.2	175.9	176.0
Potential number of shares issuable under the Company's LTSIP	0.3	0.3	0.2	0.3
Weighted-average diluted common shares outstanding	176.1	176.5	176.1	176.3